function y=sinewave2(freq,dur,rate)
% y=sinewave2(frequency,duration,samplerate)
%  generate a sinewave
%   samplerate defaults to 11025Hz
%   duration defaults to 1.0s
%   frequency defaults to 1000Hz
if (nargin<3) rate=11025; end
if (nargin<2) dur=1.0; end
if (nargin<1) freq=1000; end
t = 0:1/rate:dur;
y = sin(2*pi*freq*t);